/* 头部 */
.header {
  position: sticky;
  left: 0;
  top: 0;
  background-color: transparent;
  width: 100%;
  z-index: 1000;
  padding-top: 1em;
  /* 响应式兼容 */
}
.header .navbar-inverse {
  background-color: transparent;
  border-color: transparent;
}
.header .navbar-inverse .navbar-nav > li > a {
  color: #fff;
}
.header .logo {
  text-transform: uppercase;
  color: #fff;
  transition: all 0.1s linear;
}
.header .logo:hover {
  transform: scale(1.2);
}
.header .menu a {
  text-transform: uppercase;
  border-bottom: 3px solid transparent;
  font-size: 1em;
}
.header .menu a span {
  display: inline-block;
  transition: all 0.1s linear;
  font-size: 1em;
}
.header .menu a:hover {
  border-bottom: 3px solid #fcac45;
}
.header .menu a:hover span {
  transform: scale(1.2);
}
@media screen and (max-width: 768px) {
  .header .menu a {
    text-align: center;
  }
}
/* 公共标题 */
.common_title {
  width: 100%;
  margin-top: 10em;
}
.common_title h1 {
  text-align: center;
  font-size: 3em;
  font-family: "OSLight";
  margin-bottom: 0.3em;
}
.common_title h1 span {
  font-weight: 700;
}
.common_title p:nth-of-type(1) {
  width: 7em;
  height: 0.2em;
  background-color: #fcac45;
  margin: auto;
  margin-bottom: 0.5em;
}
.common_title p:nth-of-type(2) {
  width: 5em;
  height: 0.2em;
  background-color: #fcad455b;
  margin: auto;
}
@media screen and (max-width: 350px) {
  .common_title h1 {
    font-size: 2.5em;
  }
}
/* 页尾 */
.footer {
  width: 100%;
  height: 130px;
  background-color: #222;
  line-height: 130px;
}
.footer .footer_date {
  color: #ccc;
  font-family: "OSLight";
}
.footer .footer_date span {
  font-family: "OSBold";
}
.footer .footer_icon {
  text-align: right;
}
.footer .footer_icon a {
  margin: 0 5px;
}
@media screen and (max-width: 768px) {
  .footer {
    height: 100px;
  }
  .footer .footer_date {
    text-align: center;
    font-size: 0.5em;
    line-height: 50px;
    padding: 0;
  }
  .footer .footer_icon {
    text-align: center;
    line-height: 50px;
  }
}
/* 回到顶部 */
#back {
  position: fixed;
  bottom: 30px;
  width: 100px;
  height: 100px;
}
.back {
  animation: rubberBand 1s;
}
@keyframes rubberBand {
  0% {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
  }
  30% {
    -webkit-transform: scaleX(1.25) scaleY(0.75);
    -ms-transform: scaleX(1.25) scaleY(0.75);
    transform: scaleX(1.25) scaleY(0.75);
  }
  40% {
    -webkit-transform: scaleX(0.75) scaleY(1.25);
    -ms-transform: scaleX(0.75) scaleY(1.25);
    transform: scaleX(0.75) scaleY(1.25);
  }
  60% {
    -webkit-transform: scaleX(1.15) scaleY(0.85);
    -ms-transform: scaleX(1.15) scaleY(0.85);
    transform: scaleX(1.15) scaleY(0.85);
  }
  100% {
    -webkit-transform: scale(1);
    -ms-transform: scale(1);
    transform: scale(1);
  }
}
@media screen and (max-width: 768px) {
  #back {
    width: 50px;
    height: 50px;
  }
}
